83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
89 lines
1.5 KiB
C
89 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012 Stefan Roese <sr@denx.de>
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*/
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/*
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* Driver for SPEAr600 GPIO controller
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*/
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#include <common.h>
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#include <asm/arch/hardware.h>
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#include <asm/gpio.h>
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#include <asm/io.h>
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#include <errno.h>
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static int gpio_direction(unsigned gpio,
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enum gpio_direction direction)
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{
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struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
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u32 val;
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val = readl(®s->gpiodir);
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if (direction == GPIO_DIRECTION_OUT)
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val |= 1 << gpio;
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else
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val &= ~(1 << gpio);
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writel(val, ®s->gpiodir);
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return 0;
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}
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int gpio_set_value(unsigned gpio, int value)
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{
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struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
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if (value)
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writel(1 << gpio, ®s->gpiodata[DATA_REG_ADDR(gpio)]);
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else
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writel(0, ®s->gpiodata[DATA_REG_ADDR(gpio)]);
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return 0;
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}
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int gpio_get_value(unsigned gpio)
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{
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struct gpio_regs *regs = (struct gpio_regs *)CONFIG_GPIO_BASE;
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u32 val;
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val = readl(®s->gpiodata[DATA_REG_ADDR(gpio)]);
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return !!val;
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}
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int gpio_request(unsigned gpio, const char *label)
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{
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if (gpio >= SPEAR_GPIO_COUNT)
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return -EINVAL;
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return 0;
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}
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int gpio_free(unsigned gpio)
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{
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return 0;
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}
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void gpio_toggle_value(unsigned gpio)
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{
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gpio_set_value(gpio, !gpio_get_value(gpio));
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}
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int gpio_direction_input(unsigned gpio)
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{
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return gpio_direction(gpio, GPIO_DIRECTION_IN);
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}
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int gpio_direction_output(unsigned gpio, int value)
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{
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int ret = gpio_direction(gpio, GPIO_DIRECTION_OUT);
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if (ret < 0)
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return ret;
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gpio_set_value(gpio, value);
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return 0;
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}
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